Superheater for air, vapor, or gas.



F. O. BYNOE.

SUPERHEATER FOR AIR, VAPOR, 0R GAS.

APPLICATION FILED JULY 1. 191a.

Patented Apr. 1, 1919.

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SUPERHEATER FOR AIR, VAPOR, 0R GAS.-

APPLICATION FILED l'JLY 1. 1918.

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SUPERHEATER FOR AIR, VAPOR, 0R GAS.

APPLICATION FILED JULY I. 1918.

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FREDERICK OATLEY BYNOE, OF TWICKENHAM, GLAND.

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Specification of Letters Patent.

Patented Apr. 1, 1919.

Application filed July 1, 1918. Serial No. 242,880.

To all whom it me concern:

Be it known t at I, FREDERICK OATLEY BYNOE, a subject of the King of Great Britain and Ireland and resident of Twickenham, county of Middlesex, England, have invented a new and useful Improvement in and Connected with Superheaters for Air, Vapor, or Gas, of which the following is a specification.

The object of my invention is to obtain a large volume of superheated (high temperature) air, vapor or gas by means of the hereinafter described construction of a' superheater, an essential feature of the invention being the constant velocity of the air or the like maintained in passing through the heating chambers, means being provided to facilitate the cleaning of the air passages, and at the same time simplify the removal or repair of the parts of the apparatus. A superheater in accordance with my invention comprises:

1. One or any number of superimposed or otherwise arranged air, vapor or gas heating or any chambers constructed of metal, 0 ay, suitable refractory material, around which flow the hot gases from a furnace. Each chamber is closed at one end, and, in the case of several being employed, they are con-v nected by a passage or 'passa s between them at their open ends. The c ambers are oblong, rectangular or wedge-shaped, and, in the case of several being employed, they increase in cross-sectional area as they approach nearer the hottest gases from the furnace. The walls ,of the one wall of the chamber nearest to it. The

external walls of these chambers form tortuous flue passa s between the furnace and e chambers are either horizontal, vertical, inclined, staggered, or placed side by side.

2. A slidin diaphragm of any suitable material divi mg each heating chamber longitudinally into two wedge-shaped parts or compartments, except for a space at the closed end of the chamber, which space provides a pas'sa from one compartment to the other for t iie to be heated. The diaphragm may or may not be corrugated to allow for the expansion of the material of which it is made. The diaphragm is supported in position by side ledges or grooves, -.or other supports are rnace may form extends along the mterior of the chamber a,

air, vapor on, gas which is placed underneath at any position where they may be required.

3. ,A head and box end to the diaphragm plate is provided for the purpose of making a tight oint in the outer wall of the connecting air passages 01' for the withdrawal of the diaphragm for cleaning or renewal of parts.

For a clear understanding of the invention, reference is to be had to the following description and accompanying sheets of drawings, in which Fi re 1 is a longitudinal section of an air super eater composed of four layers of heater chambers arranged in opposite series.

Fig. 2 is an end view thereof, partly broken away in order to show the box to which the diaphragm is attached and the transverse position of the diaphragm in the heater chamber.

Fig. 3 is a longitudinal sectional view'of one of the superheater units, drawn to a larger scale.

Fig. 4 is a 101i "tudinal section of a wedgeshaped heater 0 amber.

Fig. 5 is a pers ective view of an alternative wedge-shape heater chamber.

Fig. 6 is a plan view of the heater chamber shown inFig. 5.

Like letters of reference indicate corresponding parts in the several figures.

In carrying out the invention and referring to Figs. 1 and 2, each heating-chamber a is of oblong or rectangular shape, closed at the end I), but open at the end 0, c. and a slidable diaphragm-d carried by a head c said diaphragm (Z, which is arranged at. a slant and extends across said chamber and rests on side ledges f, dividing said chamber a into two parts or compartments 9 and h, except for the space at i which forms a passage between said parts or compartments 9 and h; the diaphragm d, further, extends across and divides a passage, with which the open end a, c communicates, into two parts 7' and 7:, bein vthe inlet andk the outlet for the air which 1s to be heated.

. .The head 6 of the diaphragm cl is secured by a button piece m and lugs nto a box '0 'The slanting posltion of the diaphragm d p in the chamber 1; provides one compartment g gradually increasing in cross-sectional area from c to 0 and a'second compartment h, also gradually increasing in cross-sectional area from 0 to 0 the sectional area of both compartments at 0 and 0 being equal.

The diaphragm d can be removed for the purpose of cleaning the chamber a or for the renewal of parts, by simply disengaging the button piece m from the lugs n and then withdrawing said button piece m and with it the head 6 and diaphragm d.

The air, vapor or gas which is to be heated enters by two passages s and s, flows into the first heating chambers a by way of the compartments g, through the openings '5,

and along the compartments h, into the main passageway t which connects the outlet k of the chamber a with the inlet 7' of the next chamber a inthe series, and so on until it leaves the superheater at the combined outlet '0, the heat from the furnace w traversing the fiues w and exiting by way of passage 3 V The object of the gradual increaseof the sectional area of the chamber compartments from the air, vapor or gas inlet to outlet is to provide for the expansion resulting from the increased temperature which would produce a back pressure on the fan or blower supplying the air, vapor or gas, and also increase its velocity through the heating chambers.

In cases where it is desirable to increase the differentiation between the sectional area of the air inlet and outlet, the heating chamber is of wedge-shape as shown in Fig. 4.

Figs. 5 and 6 represent an alternative method'of obtaining the gradual increase in the cross-sectional areas between the inlet and outlet of the heating chambers, in which two reverselywedge-shaped members or boxes, of which Fig. 5 is a perspective view and Fig. 6 a' plan view, are combined. The two sections a, a and a and a open into one another so as to form one chamber a, a, a a A diaphragm d-Fig. 5is introduced into that part of the chamber which has the largest open end, and divides'the whole chamber into two reverse wedgeshaped compartments except for a space at the closed end a which provides a passage similar to passage '5 Fig. 3 for the air,vapor or gas from the inlet j to one outlet 7;, viz and k of the previous examples.

The same arrangement of connecting passages, and the same head and box end to diaphragm is applied as in the case of the use of an oblong or rectangular chamber shown in Fig. 1.

Each chamber in series has a larger sectionalarea than the one preceding it, so

that the inlet of each chamber equals the outlet of the one before it. In this way the increased expansion of the heated air, vapor or gas through all the chambers is provided for, and insures a constant velocity of the flow of the air from inlet to the superheater outlet.

The construction of the chambers provides for a comparatively thin column of air flowing in contact, with a very large heating surface, and insuresits being heated throughout to a high temperature.

Having now described my invention, what I claim as new and desire to secure by vLetters Patent of the United States is 1. An air, vapor or gas superheater chamber characterizedin that it is of oblong or rectangular shape divided into two compart-- ments by a removable sliding diaphragm placed at'a slant to provide a passage of gradual increasing sectional area from inlet to outlet, substantially as described.

2. In an air, vapor or gas superheater, a diaphragm having a head and box end for the purpose of withdrawing the dia hragm and for making a tight joint in t e outer wall of the inlet passage, substantially as described.

3. In air, vapor or gas superheaters, a diaphragm, a box end thereto and means on said box end to hold said diaphragm in position, substantially as described.

4. A superheating furnace having opposite intake flue passages on each side of its heating compartment above the fire box, a plurality of superheating units arranged in opposing and alternating relation and having their open ends in communication with sald intake flues, and means carried by the walls of the furnace constituting one side of the said intake fiues, and projecting into the superheater units to divide the same into in take and discharge passages.

5. A superheating furnace having opposite intake flue passages on each side of its heating compartment above the fire box, a plurality of superheating units arranged in opposing and alternating relation and having their open ends in communication with said intake flues, and diaphragms carried by the walls of the furnace constituting one side of the intake flues, said diaphragms projecting into the superheater unlts at an lation within the heating chamber above the fire box of the furnace and being of gradu= ally increaslng size from the top of the heating chamber toward the bottom thereof, a removable diaphragm carried by the furnace structure for dividing the superheater units into passages of varying width.

7. A superheater unit for superheating furnaces consisting of a tubular body closed at one end and open at the other, and a diaphragm adapted to be disposed within the chamber from the open end thereof to provide a double passage through the unit which passage is of gradually flaring width from the intake end toward the outlet end.

8. A superheater structure consisting of a furnace wall having a passage-way, a

superheater ,unit closed at one end and having its open end supported in said wall and opening into the passage, and a member removably fitted to the side of the wall opposite that carrying 'the superheater unlt, and adapted to obstruct the said passage to direct gases into the superheater unit and divide the latter into a double passage which increases in sectional area from the intake side of the diaphragm toward the outlet side thereof.

In testimony whereof I have aflixed my signature this 22nd day of May, 1918.

FREDERICK OATLEY BYNOE. 

